Finding the Fourth Proportional to 2,080.86, 3,119.18 and 1,385.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.86 : 3,119.18 = 1,385.80 : x
2. Step 2: Convert to fraction form
   2,080.86/3,119.18 = 1,385.80/x
3. Step 3: Cross multiply
   2,080.86x = 3,119.18 × 1,385.80
4. Step 4: Simplify right side
   2,080.86x = 4,322,559.64
5. Step 5: Solve for x
   x = 4,322,559.64/2,080.86
6. Step 6: Final answer
   x = 2,077.29